I saw a fantastic deal on a Cisco 1861 SRST on eBay, so decided that our home needed one.

Beautiful, isn’t it?

After registering for a new Sipgate account and using the config from www.netconf.co.uk, I found that the new user IDs couldn’t be entered into CME as a ‘clid network-number’.

Cisco IOS only takes a numerical value as the ‘clid network-number’ but Sipgate user IDs have a letter in them.

As a workaround for this, I manually amended ‘From’ field the SIP Invite message sent to Sipgate.

Instead of:

dial-peer voice 1 voip
  clid network-number xxxxxxxx

I’ve used the following:

voice class sip-profiles 1
 request INVITE sip-header From modify "(<.*:)(.*@)" "\1xxxxxxxx@"

dial-peer voice 1 voip
  voice-class sip profiles 1

This was taken from Cisco’s example found here.